When you see these in real life it shows you the deep bloody depth of the internal multi layer core tech that gives off the effect of guts or brains. I always had a weird morbid appreciation to gore and guts and these hit a certain spot for me. The opal is a big fat fat 12mm hand picked by me and gives off insane glows of fire. Comes ready to wear out the pack on an adjustable 550 paracord.